We had a customer move their email to Office 365. They realized they weren’t getting emails from the website anymore. Three people in the company with the same domain name in their email ( ie: @somecompany.com ) were included in the contact us form weren’t getting the emails anymore.

The site was WordPress and they were using Gravity Forms for the contact us form. I added my personal email and I could get the email, but the customer didn’t. I eventually discovered the email was going into the “Junk” box of their Office 365 account. I needed to “whitelist” the email that was used in the Gravity Form form. That was “recruiting@somecompany.com”.

What eventually solved everything was “whitelisting” their domain in Office 365. I had to go into their Office 365 account as the Admin. Go to the Exchange area.

Thanks for solving my problem! I am using Contact Form 7, not Gravity Forms.
I had tried clicking the “Junk mail->Never block this sender” in Outlook but that didn’t work. Your solution worked.
I took it one step further and only whitelisted the “wordpress@domain.com” address rather than the whole domain, and that seems to work too.